The Rules of Calculation

Calculation uses a standard 52-card deck (no jokers).  To begin the game the 
deck is shuffled, then any ace, two, three, and four are pulled from the deck 
and form the start of four foundations.  These foundations are built up 
according to the following sequence, regardless of suit or color:

            A,2,3,4,5,6,7,8,9,10,J,Q,K
            2,4,6,8,10,Q,A,3,5,7,9,J,K
            3,6,9,Q,2,5,8,J,A,4,7,10,K
            4,8,Q,3,7,J,2,6,10,A,5,9,K

Cards are turned up from the deck one at a time, and can be played on the 
foundations or on any of four wastepiles located just below the foundations.  
The top of the wastepiles are always available for play to a foundation, but 
once a card is played to a wastepile, it cannot be moved again, except to a 
foundation.

The game is won by building all four foundations up to king.  The skill 
involved in playing Calculation, in addition to just keeping track of what 
card goes next on each foundation, is in avoiding covering up a card you'll 
need soon with a card that cannot be used for some time, if at all.  Kings 
are especially troublesome, since they cannot be moved until at least one 
foundation has been fully built up.

The general strategy is to build on the wastepiles in descending order, but 
the cards are seldom so kind as to allow this to any great degree.